Mishkat al-Masabih #307
Purification
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَعَن ابْن مَسْعُود كَانَ يَقُولُ: مِنْ قُبْلَةِ الرَّجُلِ امْرَأَتَهُ الْوُضُوءُ. رَوَاهُ مَالك
Ibn Mas'ud used to say, “Ablution is necessary when a man kisses his wife.”
Malik transmitted it.
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About Mishkat al-Masabih
This hadith is #307 from Mishkat al-Masabih, in the Book of Purification.